General Relativistic Hydrodynamic Simulations around Accreting Black Holes

TL;DR

This paper discusses the development of a simulation tool for modeling sub-Keplerian accretion flows onto black holes using general relativistic hydrodynamics, moving beyond traditional pseudo-Newtonian approximations.

Contribution

It introduces a new numerical simulation framework for general relativistic fluid dynamics around black holes, enabling more accurate modeling of accretion flows.

Findings

Successful implementation of the simulation tool.

Simulation results of sub-Keplerian accretion flows.

Potential for improved understanding of black hole accretion physics.

Abstract

Strong gravity in the immediate vicinity of compact objects (e.g., black holes, neutron stars) necessitates inclusion of general relativistic effects. Traditionally, pseudo-Newtonian potential representation of gravity were favored to simulate the fluid motion in this region since that reduced the calculation complexity. However, with the advent of easily implementable, reliable numerical algorithms and computer hardware, more and more research groups are shifting towards the numerical solutions of general relativistic fluid dynamics equations. In this work, we report our progress on the development of such simulation tool and present results of sub-Keplerian accretion flow onto black holes.